Full regression - API test cases

1. API of positive tests

1.1. Verify the API response code for a valid request.

1.1.1. Verify the API request payload for a valid request.

1.1.1.1. Verify the API response headers for a valid request.

1.1.1.1.1. Verify the API request method for a valid request.

2. API of negative tests

2.1. Verify the API response code for an invalid request.

2.1.1. Verify the API request payload for an invalid request.

2.1.1.1. Verify the API response headers for an invalid request.

2.1.1.1.1. Verify the API request method for an invalid request.